When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Yes, for instance the Clifford Dual Zone Prox may be added by any competent installer who is able to find power, ground, the so-called "negative armed output" which enables the sensor when the alarm is armed, and a suitable trigger input for the internal zone amongst the wires on the Sigma ECU. Then a suitable small piezo sounder can be relay-driven by the external warn-away output from the sensor.